Toyokura Minoru, Ishida Akira, Watanabe Fumihiro, Okada Noriko, Yamazaki Miyako
Department of Rehabilitation Medicine, Tokai University, Oiso Hospital, Kanagawa, Japan.
Disabil Rehabil. 2003 Dec 16;25(24):1339-43. doi: 10.1080/09638280310001616295.
To investigate intermanual differences in the performance of the Japanese Trail Making Test (JTMT) using an intra-subject comparison, and to investigate how the cognitive and motor times spent in performing the task were related with the total completion time.
All subjects performed both parts A and B of the following three tasks: JTMT with the right hand (R); JTMT with the left hand (L); and a mirror version of the JTMT with the left hand (M). The order in which these three tasks were performed (RLM, RML, LRM, LMR, MRL, and MLR) was randomly determined. An interval of 4 weeks was scheduled between each examination. In addition to the completion time, we measured 'motor time', a sum of the times for drawing lines to connect the targets, and 'cognitive time', a time obtained by subtracting the motor time from the completion time.
The task-completion time was more strongly correlated with the cognitive time than with the motor time. The order of the task performance did not influence the task-completion time. A learning effect was found only between the first and second examinations of part A. The cognitive time for the second and third performances of part A were significantly shorter than that for the first task, whereas the motor time remained unchanged. No intermanual differences in the performance were found in any comparisons.
The non-dominant hand can be used as an alternative hand in the JTMT, and it can be expected to perform comparably to the dominant hand. These findings are consistent with the finding previously obtained by inter-subject comparison. The lack of any significant intermanual difference can be explained by that the total completion time is less influenced by the motor time than by the cognitive time.
采用受试者内比较法研究日本连线测验（JTMT）执行过程中的双手差异，并研究执行任务所花费的认知时间和运动时间与总完成时间之间的关系。
所有受试者均执行以下三项任务的A部分和B部分：右手进行JTMT（R）；左手进行JTMT（L）；左手进行JTMT镜像版（M）。这三项任务的执行顺序（RLM、RML、LRM、LMR、MRL和MLR）是随机确定的。每次检查之间安排4周的间隔。除了完成时间外，我们还测量了“运动时间”（连接目标的划线时间总和）和“认知时间”（完成时间减去运动时间所得）。
任务完成时间与认知时间的相关性比与运动时间的相关性更强。任务执行顺序不影响任务完成时间。仅在A部分的第一次和第二次检查之间发现了学习效应。A部分第二次和第三次执行的认知时间明显短于第一次任务，而运动时间保持不变。在任何比较中均未发现双手在表现上的差异。
在JTMT中，非优势手可作为替代手使用，并且可以预期其表现与优势手相当。这些发现与先前通过受试者间比较获得的结果一致。双手之间缺乏任何显著差异可以解释为总完成时间受运动时间的影响小于受认知时间的影响。
